That code should go in test2.asd:

    ;;;; test2.asd

    (asdf:defsystem #:test2
      :depends-on (#:cl-ppcre)
      :serial t
      :components ((:file "package")
                   (:file "test2")))

Then you have package.lisp:

    (defpackage #:test2
      (:use #:cl)
      (:export #:my-great-test))

Then you can put this in test2.lisp:

   ;;;; test2.lisp

   (in-package #:test2)

   (defun my-great-test ()
     (describe 'cl-ppcre:regex-apropos))

Put those files somewhere ASDF knows about. I like to put it in
something like ~/quicklisp/local-projects/test2/, so you can, from the
repl, use this:

    (ql:quickload "test2")

Then you should be able to evaluate, in the REPL:

    (test2:my-great-test)

Many people automate the process of setting up project directories,
system files, and initial sources. My automation of it is the
quickproject utility; there are several others.

I don't recommend putting calls to code-loading functions directly in
source files, most of the time.

Zach